[Bug 1701073] Re: CVE-2017-2619 regression breaks symlinks to directories

[Andreas Hasenack]

Fix confirmed for artful, test packages here: ppa:ahasenack/samba-dir-
symlink-1701073

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Title:
  CVE-2017-2619 regression breaks symlinks to directories

Status in samba:
  Unknown
Status in samba package in Ubuntu:
  In Progress

Bug description:
  Found in current version in Xenial (4.3.11+dfsg-0ubuntu0.16.04.7).
  When share's path is '/', symlinks do not work properly from Windows
  client. Gives "Cannot Access" error.

  To reproduce:

  1. Install samba and related dependencies

  apt install -y samba

  2. Add a share at the end of the default file that uses '/' as the
  path:

  [reproducer]
          comment = share
          browseable = no
          writeable = yes
          create mode = 0600
          directory mode = 0700
          path = /

  3. Attempt to access a symlink somewhere within the path of the share
  with a Windows client.

  4. Receive "Windows cannot access..." related error

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